Setts



(No Model.) I I E. R. HYDE 81A. VALLENTINE.

- GRINDSTONE HOOD. No. 279,248.

Patented June 12,1888.

FIZZ/61712071? 64%. /5

@Ju MW Wm;

Rs Phuwuxho n hu, Washin UNITED STATES PATENT OF ICE.

ELVIN It. HYDE AND ARTHUR VALLENTINE, OF SPRINGFIELD, MASSACHU- SETTS; SAID VALLENTINE ASSIGNOR TO SAID HYDE.

GRINDSTONE-l-IOOD.

SPECIFICATION forming part of Letters Patent No. 279,248, dated June 12, 1883.

A pp licalion filed November 2'24, 18852.

(No model.)

To all whom it may concern Be it known that we, ELWIN It. HYDE and ARTHUR 'VALLENTINE, citizens of the United States, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Grindstone-Hoods, of which the followingis a specification.

This invention relates to an improved adjustable hood, in combination. with the stone and its frame, of a knife-grinding machine and it consists, in brief, of a sheet-metal cover held to partially inelose the periphery of a stone, provided with a water-can, and adjustably secured to a peculiarly-formed seat of the stoneframe, to admit of its being moved thereupon to maintain an operative position relative to the stone as it decreases in size from wear, and provided with an adjustable mouth-piece, to adapt the size of the mouth to the position of the knife being ground, all as hereinafter more particularly set forth, and as fully illus trated in the accompanying drawings, in

Figure I is an elevation in partial section of our device combined with so much of a knifegrinding machine as is necessary to illustrate its operation. Fig. II is apartial front elevation of the same. i Fig. III is a detail view of the same. Figs. IV and V are different views of the hood-seat, and Fig. VI is a portion of the hood.

B is the stone, hung in the frame 0 in the usual manner, and revolved by suitable means to grind the knife 1), fed against its grindingsurface upon the bed of the machine H. The frame 0 is hinged at c, and held by a setscrew, (1, to the segmental arm d from the machine, so that as the stone wears it may be swung, with its frame, upon hinge c, and be secured in the required position by screw (1'. To .retain the particles set free from the stone and knife by grinding and prevent them from flying, as well as to prevent the escape of water supplied to the stone from can IV, a hood, D, is secured to the stone-frame and arranged to partially envelop the stone, as seen in the drawings, and as is common; but in order to permit the hood D to be moved upon the stone B as it decreases in size, for the purpose of always keeping the perimeter of the stone effectively within the hood, as well as to keep the drip from the can in the same relative position to the grinding point, the hood is j made adjustable to the stone in the following manner: The lower part of hood I) is provided with lugs c '0, into which are received screw-bolts 1 y, as shown in Fig. VI. The lower surface of these lugs is faced to corre spond with the plane surface on of part E, so that when the hood rests upon part E and the bolts 1 y extend therethrough thelug-surface is seated upon part E, and can be secured thereto by clamp-nuts upon the bolts 1 y. The holes 0 2*, through. which extend the bolts 1 3 are made elongated, and the part E being secured to the frame 0 to seat the hood D, it will be seen that the hood can be moved easily upon its seat from the position, as shown in Fig. I, upon an unworn stone, to keep the perimeter of the stone as it is. reduced within the hood.

The part E is constructed and arranged as follows: At the proper distance below the stone, as shown, and parallel to its axis, is ar ranged from side to side of the frame the bar 0, cut away, as shown in Fi III, and of shape in cross-section as seen in Fig. l. The recess 0 corresponds to the transverse opening 0 in the bottom of part E, and the rib a on So each side of recess 0 corresponds to the channels a upon each side of part E, which construction enables the part E to rest upon bar 0 and fit it snugly by resting both upon the flange m and upon the top of the rib, while 8 5 clamp-screws t 2, through the side walls of the channels a, hold it firmly in place. The recesses 0 0 permit the part E to be compactly combined with the bar 0, while the seat-surface m is a continuous plane upon which the hood may be moved back and forth for the purpose described.

In order to keep the mouth of the hood re dueed to the smallest opening consistent with the free access of the knife-edge to the stone, a door, D, is combined with the upper end of the hood, and made extensible and retractile thereupon, by means of which capacity the stone may be exposed to permit the knife I) to be turned in the opposite position in which it too is shown in Fig. I upon the bed of the machine H, to be ground from the edge instead of toward it, and by means of which the practi cally upper end of the hood may be kept away from the knife as the frame G is swung with a much reduced stone. The hood-door D fits upon the hood D, being of the same configuration in cross -sect-ion, and asetscrew, (1, through the side of the door D, coining against the side of hood D, retains door D in the position into which it is slid. In Fig. I]: the hood-door D is shown in position to open the mouth of the hood to its widest extent, in which position an opening in the upper wall of the door coinciding with a hole in the hood D permits the drip from the can WV to reach the stone B. By these means a hood is pro v'ided for a grindstone which is adjustable to all conditions of the stone and to varied posi tions of the knife, and which is effective to at all times prevent the flying of particles from the stone and knife and the escape of water.

means, as 17/, for seeming it in position, sube stantially as shown and described.

ELNVIN R. HYDE. ARTHUR VALLENTINE.

'Witnesses:

R. F. HYDE, \VM. H. CHAPIN. 

